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This issue is quite controversial and it applies to laptops, tablets and smart phones.
Usually the „bringing“ is not really an issue, you can have anything in your bags and connect it via the mobile phone network as long as it does not absorb the working time.
But usually this implies a bit more.
There are some advantages in having company emails and calendar on a smart phone. This is convenient and useful. But there are some security concerns that should be taken serious. How is the calendar and the emails accessed? How confidential are the emails? Do they pass through servers that we do not trust? What happens, if a phone gets lost?
This is an area, where security concerns are often not taken too serious, because it is cool for top manager to have such devices. And they can just override any worries and concerns, if they like.
This can be compensated by being more restrictive in other areas. 😉
Anyway, the questions should be answered. In addition, the personal preferences for a certain type of phone are very strong. So the phone provided by the company might not be the one that the employee prefers, so there is a big desire to use the own phone or one that is similar to the own phone, which depends on the question of who pays the bills, how much of private telephony is allowed on the company phone and if there are work related calls to abusive times.
Generally the desirable path is to accept this and to find ways to make this secure.

The other issue is about the computer we work with. For some kind of jobs it is clear that the computer of the company is used, for example when selling railroad tickets or working in the post office or in a bank serving customers.

It shows that more creative people and more IT-oriented people like to have more control on the computer they work with.
We like to have hardware that is powerful enough to do the job. We like to be able to install software that helps us do our job. We like to use the OS and the software that we are skilled with. Sometimes it is already useful to be able to install this on the company computer or in a virtual computer within the company computer. Does the company allow this? It should, with some reasonable guidelines.

Some companies allow their employees to use their own laptops instead. They might give some money to pay for this and expect a certain level of equipment for that. Or just allow the employees to buy a laptop with their own money and use it instead of the company computer. They will do so and happily spend the money, even though it is wrong and the company should pay it. But the pain of spending some of the own money is for many people less than the pain of having to use crappy company equipment.

This rises the question of the network drive Q:, the outlook, MS-Word, MS-Excel,…
Actually this is not so much an issue, at least for the group we are talking here. Or becoming less of an issue.
Drive Q: can quite well be accessed from Linux, if the company policies allow it. But actually modern working patterns do not need this any more.
We can use a Wiki, like MediaWiki or Confluence for documentation. This is actually a bit better in many cases and I would see a trend in this direction, at least for IT-oriented teams.
Office-Formats and Email are more and more providing Web-Applications that can be used to work with them on Linux, for example. And MS-Office is already available for Linux, at least for Android, which is a Linux Variant. It might or might not come for Desktop Linux. LibreOffice is most of the time a useful replacement. Maybe better, maybe almost as good, depending on perspective… And there is always the possibility to have a virtual computer running MS-Windows for the absolutely mandatory MS-Windows-programs, if they actually exist. Such an image could be provided and maintained by the company instead of a company computer.

It is better to let the people work. To allow them to use useful tools. To pay them for bringing their own laptop or to allow them to install what they want on the company laptop. I have seen people who quit their job because of issues like this. The whole expensive MS-Windows-oriented universe that has been built in companies for a lot of money proves to be obsolete in some areas. A Wiki, a source code repository, … these things can be accessed over the internet using ssh or https. They can be hosted by third parties, if we trust the third party. Or they can be hosted by the company itself. Some companies work with distributed teams…

It is of course important to figure out a good security policy that allows working with „own“ devices and still provide a sufficient level of security. Maybe we just have to get used to other ways of working and to learn how to solve the problems that they bring us. In the end of the day we will see which companies are more successful. It depends on many factors, but the ability to provide a innovative and powerful IT and to have good people working there and actually getting stuff done is often an important factor.

When scanning a paper, it is possible to use a lot of parameters within xsane. The output format can be chosen also, for example PNG, JPG or PDF. The outcome may be a PDF-file that is way too big, easily more than 10 megabytes for a single page. It is quite easy to transform it to a smaller file:

Unless you scan very often, it is easier to scan once with a relatively high resolution and then run this conversion with different values for quality and density rather than running the time consuming scan with different xsane settings.